Part of a back pack blower



FIG. 1 is a perspective view showing our new part of a back pack blower;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The ornamental design for part of a back pack blower, as shown anddescribed.